Merge pull request #2564 from sidneycadot/fix-cpuregs-linkage

sim65: simulated CPU registers can be accessed from outside 6502.c.

src/sim65/6502.c

@@ -392,7 +392,7 @@ CPUType CPU;
 typedef void (*OPFunc) (void);
 
 /* The CPU registers */
-static CPURegs Regs;
+CPURegs Regs;
 
 /* Cycles for the current insn */
 static unsigned Cycles;

src/sim65/6502.h

@@ -65,6 +65,9 @@ struct CPURegs {
     unsigned    PC;             /* Program counter */
 };
 
+/* Current CPU registers */
+extern CPURegs Regs;
+
 /* Status register bits */
 #define CF      0x01            /* Carry flag */
 #define ZF      0x02            /* Zero flag */